Method for fluid-tight assembly of two parts in silicon nitride

A method for the fluid-tight assembly of two parts in silicon nitride of which one comprises a male end and the other comprises a female end, each of these ends being provided with mechanical assembly means which are able to cooperate together and delimit a space between them under assembling conditions, said method comprises:

• assembling said parts by cooperation between the mechanical assembly means of the male and female ends;
• filling the space existing under assembling conditions between these assembly means with a glass joint;
• and is characterized in that the filling comprises:
• coating, before assembling the parts, the mechanical assembly means of one and/or the other of the male and female ends with a borosilicate glass paste;
• applying heat treatment to the parts, after their assembly, to induce the formation in said space of a borosilicate glass joint by softening and flowing of the borosilicate glass present in said paste, then solidifying the joint thus formed,